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Re: badblock leaks system memory?

To: "Mulyadi Santosa" <mulyadi.santosa@xxxxxxxxx>
Subject: Re: badblock leaks system memory?
From: Johannes Weiner <hannes@xxxxxxxxxxxx>
Date: Mon, 02 Jun 2008 17:05:11 +0200
Cc: "Guo Hongruan" <camelguo@xxxxxxxxx>, "Bizhan Gholikhamseh \(bgholikh\)" <bgholikh@xxxxxxxxx>, "Kernel Newbies" <kernelnewbies@xxxxxxxxxxxx>
In-reply-to: <f284c33d0806010602l4b9d28e5v3378482743a19ca9@mail.gmail.com> (Mulyadi Santosa's message of "Sun, 1 Jun 2008 20:02:54 +0700")
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Hi,

"Mulyadi Santosa" <mulyadi.santosa@xxxxxxxxx> writes:

> Hi
>
> On Sun, Jun 1, 2008 at 12:33 PM, Johannes Weiner <hannes@xxxxxxxxxxxx> wrote:
>> It only drops clean stuff.  So sync first manually.
>
> Hm, really? Isn't that also forcing sync?

No.  See drop_caches_sysctl_handler() calling drop_pagecache() calling
__invalidate_mapping_pages().  The latter skips dirty pages and those
getting written back currently.

	Hannes

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- Re: badblock leaks system memory?
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